DOI: 10.1175/JCLI-D-12-00017.1
Scopus记录号: 2-s2.0-84880671563
论文题名: Examining mechanisms of variability within the pacific storm track: Upstream seeding and jet-core strength
作者: Penny S.M. ; Battisti D.S. ; Gerard H. Roe
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 14 起始页码: 5242
结束页码: 5259
语种: 英语
Scopus关键词: Atlantic basin
; Feature-tracking
; Intraseasonal variability
; North Pacific Ocean
; Spatial patterns
; Upstream seeding
; Upstream waves
; Winter months
; Climate control
; Climatology
; Mathematical models
; Storms
; jet stream
; seasonal variation
; storm track
; winter
; Atlantic Ocean
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: This paper examines how variations in two mechanisms, upstream seeding and jet-core strength, relate to storminess within the cold season (OctoberApril) Pacific storm track. It is found that about 17% of observed storminess covaries with the strength of the upstream wave source, and the relationship is robust throughout the cold season and for both the Pacific and Atlantic basins. Further analyses of the intraseasonal variability in the strength and structure of the wintertime [December-February (DJF)] Pacific jet stream draw upon both Eulerian-variance and feature-tracking statistics to diagnose why winter months with a strong-core jet stream have weaker storminess than those with a weak-core jet stream. Contrary to expectations, it is shown that the basic spatial patterns actually conform to a simple linear picture: regions with a weaker jet have weaker storminess. The overall decrease in storminess is most strongly linked to the weaker amplitude of individual storms in strong-core months. Previously proposed mechanisms are evaluated in the context of these new results. Last, this analysis provides further evidence that the midwinter suppression in storminess over the North Pacific Ocean is primarily due to a notable lack of storminess upstream of the Pacific storm track in the heart of winter. ©2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51806
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Penny S.M.,Battisti D.S.,Gerard H. Roe. Examining mechanisms of variability within the pacific storm track: Upstream seeding and jet-core strength[J]. Journal of Climate,2013-01-01,26(14)